A Dynamic Inflation Test for Soft Materials

Bentil, Sarah A.; Ramesh, K.T.; Nguyen, Thao D.

doi:10.1007/s11340-015-0122-1

Cited by 14 publications

(22 citation statements)

References 53 publications

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“…As shown in Figure 8D, the incident shock wave results in a strong change in reflection intensity as the Bragg resonance comes in to resonance with laser frequency with deformation taking ≈250 μs to manifest (relative to the arrival of the shock measured on a co-located piezo sensor). The observed timescale for PDMS based soft tissue phantom is in general agreement with published results[30]. We note that the observed times scales for PDMS-FBG composite are ≈60× slower than those observed by Rodriguez et.…”

Section: 2 Results: Photonic Sensor Characterizationsupporting

confidence: 92%

“…[29] In recent years, PDMS based phantoms have found use in characterization of dynamic response of soft tissue under blast conditions encountered in the battlefield. [30] The extensive literature on PDMS indicates the dynamic response is rate independent (see ref 16, 17 and refs cited within). High speed photography of PDMS membranes undergoing shock tube enabled inflation indicate the out-of-plane displacement is observed around ≈170 μs after the shock’s arrival while in-plane displacement can take up to ≈ 400 μs to manifest itself.…”

Section: 2 Results: Photonic Sensor Characterizationmentioning

confidence: 99%

“…High speed photography of PDMS membranes undergoing shock tube enabled inflation indicate the out-of-plane displacement is observed around ≈170 μs after the shock’s arrival while in-plane displacement can take up to ≈ 400 μs to manifest itself. [30]…”

Section: 2 Results: Photonic Sensor Characterizationmentioning

confidence: 99%

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Towards traceable transient pressure metrology

et al. 2018

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We describe our progress in developing the infrastructure for traceable transient measurements of pressure. Towards that end, we have built and characterized a dual diaphragm shock tube that allows us to achieve shock amplitude reproducibility of approximately 2.3 % for shocks with Mach speeds ranging from 1.26 to 1.5. In this proof-of-concept study we use our shock tube to characterize the dynamic response of photonic sensors embedded in polydimethylsiloxane (PDMS), a material of choice for soft tissue phantoms. Our results indicate that the PDMS-embedded photonic sensors response to shock evolves over tens to hundreds of microseconds time scale making it a useful system for studying transient pressures in soft tissue.

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Section: 2 Results: Photonic Sensor Characterizationsupporting

confidence: 92%

Section: 2 Results: Photonic Sensor Characterizationmentioning

confidence: 99%

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Towards traceable transient pressure metrology

et al. 2018

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“…Another common biomechanical measure involves deformation of soft materials (e.g., brain tissue, gels, polymers). Deformation and subsequent measures like strain can be obtained using the digital image correlation (DIC) techniques (92). Specifically, DIC calculates the strain on the soft material surface, which can then be used to analyze areas of likely cavitation injury, and provide data to help validate computational bTBI models (36,85).…”

Section: Biomechanical Measuresmentioning

confidence: 99%

Cerebrospinal Fluid Cavitation as a Mechanism of Blast-Induced Traumatic Brain Injury: A Review of Current Debates, Methods, and Findings

Marsh

Bentil

2021

Front. Neurol.

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Cavitation has gained popularity in recent years as a potential mechanism of blast-induced traumatic brain injury (bTBI). This review presents the most prominent debates on cavitation; how bubbles can form or exist within the cerebrospinal fluid (CSF) and brain vasculature, potential mechanisms of cellular, and tissue level damage following the collapse of bubbles in response to local pressure fluctuations, and a survey of experimental and computational models used to address cavitation research questions. Due to the broad and varied nature of cavitation research, this review attempts to provide a necessary synthesis of cavitation findings relevant to bTBI, and identifies key areas where additional work is required. Fundamental questions about the viability and likelihood of CSF cavitation during blast remain, despite a variety of research regarding potential injury pathways. Much of the existing literature on bTBI evaluates cavitation based off its prima facie plausibility, while more rigorous evaluation of its likelihood becomes increasingly necessary. This review assesses the validity of some of the common assumptions in cavitation research, as well as highlighting outstanding questions that are essential in future work.

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“…Some biomechanical studies have been conducted to assess mechanical responses and damage tolerance of internal organs by compression tests on intact animals or human cadaveric [7,8]. Although these studies have made important contributions to organ level verification data, they are limited in their ability to quantify local stresses and strains necessary for validation of local finite element model validation.…”

Section: Introductionmentioning

confidence: 99%

Biomechanical Experimental Study on Human Liver and Spleen and Optimization Discussion of Tissue Finite Element Simulation

Qiu¹,

Chunchen²,

Li³

et al. 2017

Intelligent Computing and Information Engineering (ICIE)

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In this study, the biomechanical properties of human liver and spleen were studied by quantifying the damage mechanisms of various organs, the biomechanical response and the rate dependence of model materials. Used CIREN and NASS-CDS databases to determine the impact characteristics of liver and spleen injuries. The fresh human organs of ram type compression test and strain rate test were conducted to determine the optimum conditions for each organ of the finite element simulation. The results showed that the responses of human liver and spleen were nonlinear and rate dependent. This study will enhance the understanding of visceral organ damage, and provide a biomechanical basis for further establishing the finite element model of human internal organs.

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A Dynamic Inflation Test for Soft Materials

Cited by 14 publications

References 53 publications

Towards traceable transient pressure metrology

Towards traceable transient pressure metrology

Cerebrospinal Fluid Cavitation as a Mechanism of Blast-Induced Traumatic Brain Injury: A Review of Current Debates, Methods, and Findings

Biomechanical Experimental Study on Human Liver and Spleen and Optimization Discussion of Tissue Finite Element Simulation

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